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Titolo:
EARLY STAGES OF PSEUDOELASTIC FATIGUE IN CU-ZN-AL SINGLE-CRYSTALS CYCLED IN THE CRYOGENIC RANGE
Autore:
MALARRIA J; SADE M; LOVEY F;
Indirizzi:
COMIS NACL ENERGIA ATOM,CTR ATOM BARILOCHE RA-8400 SAN CARLOS BARILO RIO NEGRO ARGENTINA
Titolo Testata:
Zeitschrift fur Metallkunde
fascicolo: 12, volume: 87, anno: 1996,
pagine: 953 - 962
SICI:
0044-3093(1996)87:12<953:ESOPFI>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
SHAPE-MEMORY ALLOYS; PHASE PLASTIC-DEFORMATION; MARTENSITIC-TRANSFORMATION; ELECTRON-MICROSCOPY; DISLOCATIONS; STABILITY; BEHAVIOR; COPPER; 18R; TEMPERATURES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
57
Recensione:
Indirizzi per estratti:
Citazione:
J. Malarria et al., "EARLY STAGES OF PSEUDOELASTIC FATIGUE IN CU-ZN-AL SINGLE-CRYSTALS CYCLED IN THE CRYOGENIC RANGE", Zeitschrift fur Metallkunde, 87(12), 1996, pp. 953-962

Abstract

Cu-Zn-Al single crystals were pseudoelastically cycled between the bcc austenitic phase (beta) and the 18R martensite, in the cryogenic range. The microstructural changes which take place in the bulk were studied by different techniques and a consistent description of the defects which are formed is presented. Dislocations and trapped martensite are retained in two-dimensional arrays parallel to the basal plane of the martensite (basal plane defects), and these defects are responsiblefor the strong temperature effect on the mechanical behaviour of the alloys. The dislocations form the bulk defects during the first cycling stage, and afterwards internal stresses are high enough to retain martensite which shows a 2H structure. Partial recovery takes place at temperatures close to room temperature, which supports the role that point defects play in the mechanical behaviour of these alloys.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 11:29:27